Why are the landscape templates so large, in Apple Pages?

Hello, I am wondering if anybody has experienced a similar problem and can give me some advice? I have found a great template to use, as I am writing a curriculum for a class I am teaching. The intent is to be able to have everything printed out, professionally. However, the size of all of the landscape templates (under the "books" category) are quite large! The size is always 14.22" wide x 10.67" tall, which is a size that most companies don't print in. It is frustrating, because when I choose a different size, it doesn't automatically reformat the template. Has anybody else had a similar issue? How were you able to fix your project, or get things reformatted to a more realistic size? Thank you in advance!